None of the flags is 16-bit currently.
Space savings on x86_64:
add/remove: 0/0 grow/shrink: 2/16 up/down: 7/-29 (-22)
Function old new delta
netdev_frame_hook 464 470 +6
gre_fill_metadata_dst 257 258 +1
xfrm_resolve_and_create_bundle 2817 2816 -1
ipv6_add_addr 1724 1723 -1
ip6_rt_cache_alloc 472 471 -1
ip6_route_info_create 2955 2954 -1
icmp6_dst_alloc 569 568 -1
dst_init 166 165 -1
dev_fill_metadata_dst 395 394 -1
bnxt_start_xmit 3119 3118 -1
arp_process 2524 2523 -1
addrconf_dst_alloc 442 441 -1
xfrm_lookup 2029 2027 -2
ip6_tnl_xmit 2965 2963 -2
rt_dst_alloc 200 197 -3
do_execute_actions 2799 2796 -3
addrconf_disable_policy_idev 449 445 -4
br_netfilter_rtable_init 66 61 -5
Signed-off-by: Alexey Dobriyan <adobri...@gmail.com>
---
include/net/dst.h | 19 ++++++++++---------
1 file changed, 10 insertions(+), 9 deletions(-)
diff --git a/include/net/dst.h b/include/net/dst.h
index 0f0905bda423..25decfa4e14a 100644
--- a/include/net/dst.h
+++ b/include/net/dst.h
@@ -31,7 +31,7 @@
*/
struct sk_buff;
-typedef unsigned short __bitwise dst_flags_t;
+typedef u8 __bitwise dst_flags_t;
struct dst_entry {
struct net_device *dev;
@@ -47,14 +47,15 @@ struct dst_entry {
int (*output)(struct net *net, struct sock *sk,
struct sk_buff *skb);
dst_flags_t flags;
-#define DST_HOST ((dst_flags_t __force)0x0001)
-#define DST_NOXFRM ((dst_flags_t __force)0x0002)
-#define DST_NOPOLICY ((dst_flags_t __force)0x0004)
-#define DST_NOCOUNT ((dst_flags_t __force)0x0008)
-#define DST_FAKE_RTABLE ((dst_flags_t __force)0x0010)
-#define DST_XFRM_TUNNEL ((dst_flags_t __force)0x0020)
-#define DST_XFRM_QUEUE ((dst_flags_t __force)0x0040)
-#define DST_METADATA ((dst_flags_t __force)0x0080)
+#define DST_HOST ((dst_flags_t __force)0x01)
+#define DST_NOXFRM ((dst_flags_t __force)0x02)
+#define DST_NOPOLICY ((dst_flags_t __force)0x04)
+#define DST_NOCOUNT ((dst_flags_t __force)0x08)
+#define DST_FAKE_RTABLE ((dst_flags_t __force)0x10)
+#define DST_XFRM_TUNNEL ((dst_flags_t __force)0x20)
+#define DST_XFRM_QUEUE ((dst_flags_t __force)0x40)
+#define DST_METADATA ((dst_flags_t __force)0x80)
+ u8 __pad2;
/* A non-zero value of dst->obsolete forces by-hand validation
* of the route entry. Positive values are set by the generic
--
2.13.6
